Unstable approach — N525XD

KS39 · 15

2026-08-18 16:37 UTC· KBZN KS39· OUTER REEF LLC· C25A

N525XD (Outer Reef) was operating from KBZN to KS39 on 2026-08-18. SkyMeter detected a low approach-stability score at Prineville Airport (KS39) on runway 15 at 16:37 UTC. Trace data at the event: 4320 ft AGL, 128 kt GS. Approach stability score: 35/100. Scores below 50 occur on under 10% of approaches at this runway and indicate the v2 scorer flagged the approach as highly anomalous (three or more gates exceeded the runway's P90 envelope simultaneously). METAR at the time reported 2 kt wind, 1 kt crosswind component, 16,093 m visibility. The approach-stability score rates the final approach against stabilized-approach gates (glideslope, lateral deviation, descent rate, and IAS) at defined altitudes. A low score means one or more of those were outside the normal envelope for how the approach was flown. The score is graded by guidance type, so instrument approaches (ILS or an aligned straight-in) are held to the full gate set, while visual and pattern arrivals are surfaced only when the score is clearly low. The score is advisory and observational, a deviation measure, not an assertion of an accident. Detection algorithm and known limitations: see SkyMeter methodology.

Active FAA TFR during this flight

Source: FAA TFR archive (hourly snapshot)
  • HAZARDS6/1476 2026-08-04 05:00Z – 2026-08-19 05:00Z SFC–9,000 ft

    10NM W MADRAS, OR, Tuesday, August 4, 2026 through Wednesday, August 19, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/1978 2026-08-05 06:00Z – 2026-08-20 05:00Z SFC–10,000 ft

    50NM W JOHN DAY, OR, Wednesday, August 5, 2026 through Thursday, August 20, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/1982 2026-08-05 14:00Z – 2026-08-20 03:00Z SFC–9,500 ft

    20NM N ENTERPRISE, OR, Wednesday, August 5, 2026 through Thursday, August 20, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/2313 2026-08-05 20:36Z – 2026-08-20 04:00Z SFC–13,000 ft

    34NM SW BUTTE, MT, Wednesday, August 5, 2026 through Thursday, August 20, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/2774 2026-08-07 05:00Z – 2026-08-21 05:00Z SFC–9,000 ft

    20NM SE MADRAS, OR, Friday, August 7, 2026 through Friday, August 21, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/2760 2026-08-07 13:00Z – 2026-08-21 04:00Z SFC–12,500 ft

    20NM N MCCALL, ID, Friday, August 7, 2026 through Friday, August 21, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/2775 2026-08-07 15:00Z – 2026-08-21 04:00Z SFC–10,000 ft

    22NM NW JOHN DAY, OR, Friday, August 7, 2026 through Friday, August 21, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/3041 2026-08-08 17:46Z – 2026-08-23 04:00Z SFC–13,000 ft

    36NM SW BUTTE, MT, Saturday, August 8, 2026 through Sunday, August 23, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/3074 2026-08-08 19:45Z – 2026-08-23 05:00Z SFC–9,000 ft

    20NM SE MADRAS, OR, Saturday, August 8, 2026 through Sunday, August 23, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/3131 2026-08-09 15:30Z – 2026-08-23 04:00Z SFC–12,500 ft

    20NM N MCCALL, ID, Sunday, August 9, 2026 through Sunday, August 23, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/3155 2026-08-10 13:00Z – 2026-08-23 04:00Z SFC–9,000 ft

    40NM SW MCCALL, ID, Monday, August 10, 2026 through Sunday, August 23, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/3618 2026-08-10 22:20Z – 2026-08-25 04:00Z SFC–13,000 ft

    36NM SW BUTTE, MT, Monday, August 10, 2026 through Tuesday, August 25, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/3608 2026-08-10 23:00Z – 2026-08-25 04:00Z SFC–9,500 ft

    39NM NW JOHN DAY, OR, Monday, August 10, 2026 through Tuesday, August 25, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/3763 2026-08-11 15:45Z – 2026-08-26 04:00Z SFC–10,500 ft

    20NM SW THE DALLES, OR, Tuesday, August 11, 2026 through Wednesday, August 26, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/4057 2026-08-11 22:45Z – 2026-08-26 04:00Z SFC–10,500 ft

    18NM NW JOHN DAY, OR, Tuesday, August 11, 2026 through Wednesday, August 26, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/4083 2026-08-12 00:30Z – 2026-08-26 04:00Z SFC–10,500 ft

    18NM NW JOHN DAY, OR, Wednesday, August 12, 2026 through Wednesday, August 26, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/4088 2026-08-12 00:39Z – 2026-08-27 04:00Z SFC–13,000 ft

    36NM SW BUTTE, MT, Wednesday, August 12, 2026 through Thursday, August 27, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/4094 2026-08-12 02:00Z – 2026-08-27 04:00Z SFC–10,500 ft

    18NM NW JOHN DAY, OR, Wednesday, August 12, 2026 through Thursday, August 27, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/4725 2026-08-13 14:00Z – 2026-08-27 07:00Z SFC–9,000 ft

    24NM E PENDLETON, OR, Thursday, August 13, 2026 through Thursday, August 27, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/4957 2026-08-13 17:30Z – 2026-08-28 04:00Z SFC–10,500 ft

    18NM NW JOHN DAY, OR, Thursday, August 13, 2026 through Friday, August 28, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/5112 2026-08-14 16:30Z – 2026-08-29 03:00Z SFC–9,500 ft

    19NM NW JOHN DAY, OR, Friday, August 14, 2026 through Saturday, August 29, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/5137 2026-08-15 04:00Z – 2026-08-27 15:00Z SFC–6,500 ft

    18NM NW JOHN DAY, OR, Saturday, August 15, 2026 through Thursday, August 27, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/5190 2026-08-15 04:00Z – 2026-08-29 04:00Z SFC–10,500 ft

    20NM SW THE DALLES, OR, Saturday, August 15, 2026 through Saturday, August 29, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/5212 2026-08-15 15:00Z – 2026-08-30 04:00Z SFC–9,500 ft

    19NM NW JOHN DAY, OR, Saturday, August 15, 2026 through Sunday, August 30, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/5929 2026-08-18 12:00Z – 2026-08-31 03:00Z SFC–13,000 ft

    36NM SW BUTTE, MT, Tuesday, August 18, 2026 through Monday, August 31, 2026 UTC

    View FAA NOTAM →

SkyMeter cross-referenced this flight against FAA-published TFRs that were active during its window and within its geographic bounding box. Overlap doesn't necessarily mean violation — the aircraft may have been outside the TFR’s precise polygon or flying under air-traffic-control coordination.

Pilot review data

  • Runway 15
  • 4320 ft AGL at event
  • 128 kt ground speed
  • 0 fpm vertical
  • Approach stability 35/100
  • 2 kt wind
  • 1 kt crosswind component
  • 16,093 m visibility
  • METAR KS39 160335Z AUTO 36009KT 10SM BKN065 OVC075 15/03 A3000 RMK AO2

Flight context

  • N525XD
  • Outer Reef
  • C25A
  • KBZN → KS39
  • 2026-08-18 16:37 UTC
  • KS39 runway 15

All events on this flight

Unstable approach 16:37:07 UTC · KS39 runway 15 · 4,320 ft AGL · 128 kt GS
Unstable approach 16:37:07 UTC · KS39 runway 15 · 4,320 ft AGL · 128 kt GS
Unstable approach 16:37:07 UTC · KS39 runway 15 · 4,320 ft AGL · 128 kt GS

Automated analysis. Events shown on this page (such as go-around, unstable approach, or runway events) are heuristic classifications produced by algorithms from publicly broadcast ADS-B data. They are intended to surface flights of interest for further review — they are not findings of fact, and they do not determine pilot fault, regulatory compliance, or the cause of any occurrence. Coverage gaps and sensor noise can affect accuracy. Only the relevant civil aviation authority or accident investigation body can make official determinations. How we detect events · Dispute or correct this data

SkyMeter · trace data observed via ADS-B· KS39